Spray gun



Jan. 14, 1930. c, TITTEMQRE 1,743,292

SPRAY GUN Filed J n 14, 1928 2 Sheets-Sheet l Inventor P Attornqy Jan. 14, 1930. c. LQ TITTEMORE 1,743,292

SPRAY GUN Filed June 14. 1928 2 Sheets-Sheet 2 Inventor Patented Jan. 14, 1939 UNITED STATES PATENT OFFICE SPRAY GUN Application filed June 14,

This invention relates to new and useful improvements in spray guns for use in the spraying of paint and the like and aims to provide a highly novel, simple and eflioiently operating valve action the construction of which is such as to permit of the escape of the air through a relatively large port when the spraying action is not desired which will allow the air compressor to run idle during this time. Furthermore the invention aims to provide a structure of this character which is extremely efficient in its operation and simple in construction as well as inexpensive of manufacture the same including but few parts and these so corelated as to reduce the possibility of disarrangement to a minimum.

With the foregoing and other objects in view as the nature of the invention will be better understood; the same comprises the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

. In the drawings wherein like reference characters indicate corresponding parts throughout the several views Figure 1 is a side elevation of my improved spray gun,

Figure Figure 3 is a top plan view,

Figure 4 is a front end elevation, and

Figure 5 is an inner side perspective of the pivotal valve trigger normally operative to permit of the free escape of the air when the spray is not in action so that the compressor may run idle.

Now having particular reference to the drawings, 5 designates a container for the paint or other material to be sprayed havlng a removable cap 6 upon its upper end preferably of the threaded variety and through which extends a fluid stem 7 terminating atits lower end adjacent the bottom of the.

container 5 the upper end thereof being provided with a suitable nozzle 8. Arranged upon the container cap is a horizontal bracket 9 the end remote from the fluid stem being equipped with a perpendicular sleeve 10 through an opening in the top surface of which is threaded a thumb screw 11. The invention set up herein embodies the provi- 2 is a detail longitudinal section,-

1928. Serial N0. 285,399.

sion of a somewhat elongated barrel 12 formed throughout its entire length with a bore the forward end of which is of increased diameter and threaded for receiving a threaded flange 13 of a suitable air nozzle 14 having a restricted air escape bore therethrough. Formed or constructed at the opposite end of this barrel 12 is a depending handle 15 somewhat similar to the handle of a revolver or an automatic pistol the lower end of which is equipped with a suitable depending pin or stand bracket 16 terminating in alignment with the bottom surface of the receptacle 5 so that when the'receptacle is disposed upon a support it will not tilt over.

Adjacent the upper end of the handle 15 the same is formed with a rearwardly projecting extension 17 formed with a longitudinal air passage 18 that communicates with the bore of the barrel 12 through the medium of a perpendicular passage 19 formed at the meeting point of the barrel and said handle, the lower end of this passage 17 terminating into a forwardly extending passage the end of which is tapered for providing a valve seat 20. Arranged within the rear end of the longitud'inal air passage 18 is a suitable nipple 21 to facilitate the attachment of an air hose thereto which air hose is to have communication with a suitable air compressor. The invention further embodies a valve trigger 22 formed at its upper end with a fork 23 for engagement over the barrel 12 the upper ends of the legs of this fork having openings therein to facilitate the pivotal attachment of the same to the barrel 12 at its upper surface as clearly disclosed in Figures 1, 2 and 3. Arrangedbetween the lower end of this trigger 22 and the handle 15 is an expansible coil spring 24 that normally urges the trigger away from the exhaust opening 0f theperpendicular air passage 19. The inner surface of this trigger 22 is equipped with a valve disk 25 tapered at its periphery and adapted for engagement within the valve seat 20 to prevent the escape of the air through this opening.

Formed upon the bottom surface of the barrel 12 directly in front of the trigger 22 is an abutment 26 that will be engaged by.

i the trigger 22 directly beneath the port 23 to limit the forward movement of the trigger under the action of the coil spring 24.

As clearly disclosed in the drawings the barrel 12 is adapted to be arranged within the sleeve 10 of the receptacle lid bracket 9 in such a position as to bring about the proper spaced relation of the barrel nozzle 14 and the fluid stem nozzle 8. Obviously the barrel is to be. locked at a predetermined position within the sleeve through the medium of the thumb screw 11. When the trigger 22 is drawn rearwardly by the forefinger of the hand gripping the handle 15 the air will necessarily travel through the barrel 12 and exhaust With great force through the restricted passage in the nozzle 14. This air moving over the nozzle 8 will cause a suction through the stem 7 for drawing the paint or liquid within the container 5 through the stem and nozzle bringing about the spraying action of the paint or fluid. Y

As soon as forefinger pressure upon the trigger 22 is released the air will be permitted to escape through the lower end of the perpendicular passage 19 thus permitting the air compressor which is usually used to run idle.

In View of the foregoing description when considered in conjunction with the accompanying drawings it will be apparent that I have provided a highly novel, simple and extremely efliciently operating spray gun and particularly the valve action thereof, and even though I have herein shown and described the invention as consisting of certain detail structural elements, it is nevertheless to be understood that some changes may be made therein without afiecting the spirit and scope of the appended claim.

Having thus described my invention, what I claim is In a device of the character described, the combination of a liquid container, a rising tube for said liquid, an air gun comprising a barrel having an air passage therethrough provided with a removable air nozzle at one end adjacent the outlet of the said rising tube, a handle member at the opposite end of the barrel, said handle member having formed therein communicating with the passage through said barrel an air passage and into which air under pressure is to be injected, said barrel and said handle being provided at the juncture thereof with an exhaust passage located between the first mentioned passages, and provided with a flared opening, a trigger carried by the barrel adjacent said exhaust passage, a valve carried by the trigger and adapted for seating arrangement within said exhaust opening, spring means'disposed with- ,in said handle and said trigger for maintaining the valve out' of engagement with said openings, said trigger being operable by the 

